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Event: 'Self-similar Growth Of Black Holes In The Friedmann Universe By Hideki Maeda (Valdivia Chile)'

CENTRA Seminars
Date: Thursday, September 11, 2008 At 02:30 PM
Duration: 1 Hour
Contact Info:
Vitor Cardoso
Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

It is quite presumable from recent observations that there exists a
huge black hole with millions of solar mass at the center of most
galaxies. There are many scenarios proposed for the formation of such
supermassive black holes. Among them, the scenario proposed by Zel'
dovich and Novikov in 1967 is a very attractive one, in which a tiny
black holes formed in the very early universe grows very rapidly in a
self-similar manner and becomes a giant black hole.
Realistic black holes, especially those in the early universe when
the expansion effects are far from negligible, should be modeled by
black hole solutions that include matter fields in an expanding universe.

In order to clarify the possibility of the scenario by Zel'dovich and
Novikov, we study the self-similar spherically symmetric solutions which
are asymptotic to the Friedmann universe at spatial infinity. The (non)-
existence of the solutions and the properties of the self-similar black
holes in the presence of a scalar field or a perfect fluid are discussed.

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